<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{width: 400px;
            height: 400px;
            border: 1px solid bule;
            /* 背景 */
            background-image: url(.);
            /* 不要平铺 */
            background-repeat:no-repeat;
            /* 位置 */
            background-position: 30px 80px;
            /* 模糊值 */
            background-color: rgba(0, 0, 0, 0.1);

        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>